doc: add documentation to __addErrorContext primop#15817
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Pull request overview
This PR makes builtins.addErrorContext show up in the builtins reference manual by adding argument names (.args) and a documentation string (.doc) to the underlying __addErrorContext primop registration.
Changes:
- Add
.args = {"context", "value"}for the__addErrorContextprimop. - Add a Markdown
.docblock (including an example) describingaddErrorContext.
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roberth
reviewed
May 9, 2026
This adds .args and .doc fields to the primop registration for __addErrorContext, making it appear in the builtins reference manual.
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This adds .args and .doc fields to the primop registration for __addErrorContext, making it appear in the builtins reference manual.
Motivation
more documentation -> more good
The issue is known since 2017 & I really think this function should be documented as it is helpful for making your own Nix expressions easier to debug.
Context
fixes #1609
I tried to use a similar documentation format already used on similar "side-effect" wrappers like
warn.Add 👍 to pull requests you find important.
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